I just got my frist subaru wrx and I'm trying hook up some gauges to it and I needed some help. I want to hook up an airfuel gauge and a boost gauge and I'm not sure where to hook them up at. If anyone happens to know where they get hook up at and what color the wire is for the o2 sensor for the gauge please let me know.

 

there is the front o2 but i wouldnt screw with it

boost you can tap into the vaccume line from teh BOV